burns



(No Model.) 2 Sheets-Sheet` l.

Lil-.BURNS/ COOKING STOVE. l No. 290,31. PatentedDQmlS, 1883.

(No Model.) f R E BURNS A 2 Sheets-Sheet 2.

COOKING sToVE.

Patented Deo. 18, 1888.

trice.

ROBERT E. BURNS, OF SAN FRANCISCO, CALIFORNIA..

COOKING-STOVE.

SPECIFICATION forming part of Letters PatentNo. 290,316, dated December 18, 1883.

' Application filed May s, ieee. (No model.)

T0 all whom it may concern:

Be it known that I, R. E. BURNS, of the city and county of San Francisco, State of California, have inventedImprovements in Stoves;

and I hereby declare the following to be a full,l

conduct it to the ovens, and in certain returnpassages for the smoke and unconsumed gases, whereby they are subjected to a continued high temperature for more' perfect combustion, together with secondary. air-supply passages and an arrangement of ovens, all of which will be more fully explained by reference to the accompanying drawings, in which-'- Figure 1, Sheet l, is a view of my stove, with parts of one side and the top broken away. Fig. 2 is a horizontal plan taken on the line z z, Figs. 3, 4, and 5. Fig 3, Sheet 2, is a longitudinal section taken on the line y y, Fig. 4. Fig. 4 is a vertical section taken on the line r x, Figs. 2 and 3. Fig. 5 is a vertical section taken on the line w w, Figs. 2 and 3.

A is the exterior casing, which in a stove would be constructed of iron, but in a range would be constructed of brick. Within this exterior casing is the shell B, which formsthe stove or fire-place proper. This shell is made so much smaller than the exterior casing, A, that there is a considerable space at each side and behind it, and there mayalso be a space below, if desired, into which the heat radiated from it may be received, and which is conveyed from these spaces to and through the ovens, as will be hereinafter more fully described. Openings a a are made from the outside into these spaces, at the front, to cause a circulation within the spaces and through the ovens. I prefer to make the sides of this inner chambersomewhat inclined or converging toward the bottom, which is narrower than the top, and has the grate C within it. This grate is made withits center higher than the sides, the grate-bars extending preferably longitudinally and parallel with the center and side supply fresh oxygen at the rear of the grate I make the central longitudinal bar, D, hollow,

' with its front end open to admit air from the outside. Perforations E are made in the tube below and near the rear of the grate, through which the air, after being heated during its passage through the tube in close contact with the heated fuel, is allowed to escape and mingle with the burning fuel above. It will be manifest that the side bars of the grate may also be made hollow and perforated at the rear ends, their front ends being openl to receive air from the outside, which is heated during its passage through them to the rear of the grate.

In the ordinary construction of stoves much of the carbon evolved from the fuel passes oit' in the form of smoke, and this and the other unconsuniedgases are led through various passages -around and above the ovens to the escape iiue or chimney, gradually becoming cooler all the time, and for that reason less capable of ignition.

In my apparatus I construct a passage or compartment, F, above on'e side of the inner or fuel compartment, B, and between it and the outer compartment, A, into which the unconsumed gases and carbon are admitted from the rear ofthe fuel-chamber through an opening or passage, G. From this pointthese gases are carried to the front, above the hottest portion of the fuel-chamber, so that their temperature is kept up to the point of combustion, and more fresh oxygen may be admitted at this point through a pipe or passage, IzI, to further assist in the combustion. A vertical partition or diaphragm, I, passes from front to rear through the center of the chamber, above the inner or fuel compartment, a space, J, being left at the front, through which the products of combustion may pass around into the second passage or compartment, K, through which they pass to the escape-pipe L at the rear end, thence to the chimney. This arrangement conveys the heat very evenly beneath the whole ofthe top of the part A, so that all of the openings are available for cook- IOO ing, and the heat is not more intense at one point than another. The top of the inner chamber, B, has holes M, with covers, which are ordinarily left in place; but if it is desired to use one or two holes of the range or stove, one or more of these inner covers may be removed, and a small fire being built beneath those to be used, the heat will pass up through the holes and act directly upon the vessel or vessels placed upon the holes above them.

Behind the fuel-chamber B is an oven or chamber, N, into which the heat flows from the passages O upon each side of the inner chamber, as before described. Above this oven or chamber are the ovens I), each having one or more holes,with valves or damper-s Q, to shut off or regulate the heat admitted to them. Above each of these openings is a deiiecting-plate, R, which serves to distribute the incoming heat evenly through the oven.

At the top of each oven are openings and dampers S, by means of which the hot air may be allowed to escape and the temperature of the oven reduced at will. A vertically-sliding partition, T, is fitted between the ovens, so that by raising it both may be thrown into one, or when closed different degrees of heat may be produced in each for different articles to be cooked therein.

An important feature of my invention is the interior fuel-space surrounded by spaces to receive the radiant heat from the fuel-chamber and the passages by which the unconsumed gases are kept in close contact with the incandescent fuel, with only a thickness of metal plate between, so that these gases are maintained at a high temperature, and their combustion effected before they become cooled down too much or escape.

By my arrangement of an interior fuel-space and a surro undin g exterior casing with passages to receive the radiant heat from the i`uel-eham ber, all the heat is discharged into these surrounding passages or spaces, and thus conveyed to the ovens, so as to produce an even heat of any desired intensity without exposing the ovens themselves to a strong or uncontrollable heat on any side.

As the construction of the grate will form the subject-matter of a separate application, it is not herein claimed.

Havingthus described my invention, whatI claim as new, and desire to secure by Letters Patent, is-

l. In a stove or range, an exterior casing or shell and a centrally-placed interior fuel-chamber having surrounding spaces formed between itself and the outer shell, into which heat is radiated,to be conveyed to the ovens and passages or compartments above, through which the unconsumed gases may be returned from the rear of the fire-place above the incandescent fuel, the tops of the two chambers having corresponding openings with removable covers, substantially as herein described.

2. In a stove or range, an exterior casing or shell and a centrally-placed interior fuel-ch amber having surrounding spaces to receive the hot air radiated from the interior chamber, in combination with the oven or chamber N and the superposed ovens I), with their valves or dampers, substantially as herein described.

3. In a stove or range, an exterior casing or shell and a centrally-placed interior fuel-chamber having a surrounding space or spaces to receive the heat radiated therefrom, in combination with the rear chamber, N, and the superposed ovens P I), with their heat-openings and valves, and the vertically moving diaphragm T, substantially as herein described.

4. In a stove or range, an exterior casing or shell and a centrally-placed interior fuelchamber having surrounding spaces to receive the radiant heat, and passages or compartments above, through which the unconsumed gases and carbon are returned above the fuelspace and in contact with the top plate, in combination with an air-inlet, H, opening into the return-passages, substantially as herein described.

In witness whereof I hereunto set my hand.

ROBERT E. BURNS.

Vtnesses:

XVM.. F. BooTn, J. H. BLooD. 

